Burt Rutan, one of the most legendary aerospace engineers of all time used to do regular long presentations to people on why global warming was not man made. So

Burt Rutan, one of the most legendary aerospace engineers of all time used to do regular long presentations to people on why global warming was not man made. Some of them are archived on youtube. And there's many other cases of otherwise smart people having bonkers opinions in areas outside of what they are experts in. If anything, successful people are significantly more likely to do this. It rarely results in their downfall. SpaceX will do just fine.